Which of the following could indicate that a chemical change has taken place?

gas formation

formation of a precipitate

color change

all of the above

How many grams of carbon dioxide would be formed if 38.9 g C2H2 reacted completely with oxygen

What is equivalent to a drink made with 3 ounces of 80 proof vodka?

What factor can limit the buffering capacity of a molecule?

Which of the following gases makes up the majority of the earth's atmosphere

How many protons are in nitrogen-15?

Shawn wants to buy a pair of gloves online. She needs to know the length of her hand in order to choose the correct size. Which Sl unit would be most appropriate for describing the length of her hand? A. Kilograms B. Milliliters C. Kilometers D.

Knowing the reactions between hydrogen gas and oxygen gas to form water is exothermic which would you say is greater: the average bond energies for hydrogen and oxygen or the bond energies for water? Explain.

Why would a C-O bond have only provide 358 kJ/mol each while C=O provides 799 kJ/mol? Explain in detail.

Transition metals, like copper, are found in many types of biological molecules where it is common for metals to have deviations from ideal bond angles.

How many moles of aluminum metal are required to produce 4.04 L of hydrogen gas at 1.11 atm and 27 °C by reaction with HCl? 2 Al (s) + 6 HCl (aq) → 2 AlCl3 (aq) + 3 H2 (g)